Debian dla-4480 : roundcube - security update

medium Nessus Plugin ID 299289

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4480 advisory.

------------------------------------------------------------------------- Debian LTS Advisory DLA-4480-1 [email protected] https://www.debian.org/lts/security/ Guilhem Moulin February 17, 2026 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : roundcube Version : 1.4.15+dfsg.1-1+deb11u7 CVE ID : CVE-2026-25916 CVE-2026-26079 Debian Bug : 1127447

Vulnerabilities were discovered in Roundcube, a skinnable AJAX based webmail solution for IMAP servers, which might lead to information disclosure or privilege escalation.

CVE-2026-25916

NULL CATHEDRAL discovered that the HTML sanitizer doesn't treat SVG `<feImage href=>` as an image source. This allows attackers to bypass remote image blocking to track email open action or potentially bypass access control.

CVE-2026-26079

CERT Polska discovered that CSS code in text/html emails were insufficiently sanitized, allowing an attacker to inject malicious stylesheet rules.

For Debian 11 bullseye, these problems have been fixed in version 1.4.15+dfsg.1-1+deb11u7.

We recommend that you upgrade your roundcube packages.

For the detailed security status of roundcube please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/roundcube

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
signature.asc Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the roundcube packages.

Plugin Details

Severity: Medium

ID: 299289

File Name: debian_DLA-4480.nasl

Version: 1.1

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 2/17/2026

Updated: 2/17/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2026-26079

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:roundcube-core, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:roundcube, p-cpe:/a:debian:debian_linux:roundcube-mysql, p-cpe:/a:debian:debian_linux:roundcube-plugins, p-cpe:/a:debian:debian_linux:roundcube-pgsql, p-cpe:/a:debian:debian_linux:roundcube-sqlite3

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 2/17/2026

Vulnerability Publication Date: 2/9/2026

Reference Information

CVE: CVE-2026-25916, CVE-2026-26079

IAVA: 2026-A-0159

Detections

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